Who Masters What? (必殺技完成？ Hissatsu waza kansei??) is the 170th chapter of the manga and the sixth chapter of the Martial Arts Dining Arc. Ranma does a test run of the Parlay du Foie Gras on Genma and Soun and finds that it works perfectly. Ranma is now ready to defeat Picolet so she can get out of the wedding and get the Iron Corset removed. Ranma has lost a lot of weight though, and is very sickly looking. Suddenly the iron corset drops off because she is now so skinny. Ranma decides to take on Picolet as a boy, until Picolet reminds him that he still owes 100,000 yen for the first meal they fought over.